but x is a variable so it could be anything, why assume x^3 is positive? Are you saying that if it were negative it would read -x^3? This is hard to do in email! ----- Original Message ----- From: "Mary Zanetti" <zanegray49@hvc.rr.com> To: <nyshsmath@mathforum.org> Sent: Wednesday, June 16, 2010 4:27 PM Subject: Re: #32

> Since they are asking yofind the square root of x^3, x must be positive > for x^3 to be positive... > ******************************************************************* > * To unsubscribe from this mailing list, email the message > * "unsubscribe nyshsmath" to majordomo@mathforum.org > * > * Read prior posts and download attachments from the web archives at > * http://mathforum.org/kb/forum.jspa?forumID=671> *******************************************************************